I'm sorry but if I understand correctly, what the man says sounds really dumb. Dogs that have grey hair are old dogs? Really? Is he really using human's standards for DOG HAIR?
My Mocha will be 8 months on the 8th. She has loads of grey hair on her top knot. We think it's very adorable, but of course, we're biased.

I haven't really tidied her up cos I'm planning to grow her coat a bit longer, so now she looks like a mess of colors.